/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlet;

import entity.Utente;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.sql.DataSource;

/**
 *
 * @author sflesca
 */
public class listaProdotti extends HttpServlet {

    @Resource(name = "NegozioDS")
    private DataSource negozioDS;

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        Connection con = null;
        Statement stm = null;
        ResultSet rst = null;
        try {
            /*
             * TODO output your page here. You may use following sample code.
             */
            con = negozioDS.getConnection();
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet listaProdotti</title>");
            out.println("</head>");
            out.println("<body>");
            HttpSession session = request.getSession(false);
            if (session == null) {
                out.println("Accesso non consentito");
            } else {
                Utente u = (Utente) session.getAttribute("utente");
                if(u!=null)
                    out.println("<h2>Benvenuto "+ u.getName()+"</h2>");
                String categoria = request.getParameter("cat");
                out.println("<h1>Servlet listaProdotti at " + categoria + "</h1>");
                stm = con.createStatement();
                if (categoria == null) {
                    rst = stm.executeQuery("SELECT prodotto.idprodotto, prodotto.nome,prodotto.prezzo,prodotto.categoria_idcategoria FROM negozio.prodotto");
                } else {
                    rst = stm.executeQuery("SELECT prodotto.idprodotto, prodotto.nome,prodotto.prezzo,prodotto.categoria_idcategoria FROM negozio.prodotto where categoria_idcategoria=" + categoria);
                }
                while (rst.next()) {
                    out.print("id:" + rst.getInt(1));
                    out.print("Nome:" + rst.getString(2));
                    out.println("Prezzo:" + rst.getDouble(3) + "<br>");
                }
            }
            out.println("</body>");
            out.println("</html>");
        } catch (SQLException ex) {
            Logger.getLogger(listaProdotti.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                out.close();
                if (rst != null) {
                    rst.close();
                }
                if (stm != null) {
                    stm.close();
                }
                if (con != null) {
                    con.close();
                }
            } catch (SQLException ex) {
                Logger.getLogger(listaProdotti.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
